A bipartisan delegation of U.S. senators visiting Afghanistan on Tuesday called for a new strategy from the Trump administration to turn the tide against an increasingly strong Taliban insurgency and end the longest war in U.S. history.

The delegation led by Sen. John McCain was in Kabul on a regional trip that included two days in neighboring Pakistan.

The visit preceded an expected Trump review later in the month of the strategy for the United States' longest war, now in its 16th year, a subject that was largely absent from last year's presidential campaign.